A federal investigation of a Northern California school district revealed a widespread environment of sexual harassment and assaults by students that district officials failed to adequately address, the U.S. Department of Education said.

Days after state-mandated deadlines have passed for thousands of Bay Area seventh to 12th-graders to prove they’ve received a whooping cough vaccine, over a thousand students are barred from attending school.

The president of the West Contra Costa School Board said he’ll fight to keep an elementary school open because it would cost too much money to close it. A final vote could come Wednesday night in Richmond.